package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServicelmpl implements ReportService {
    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;
    /**
     * 营业额统计
     * @return
     */
    public TurnoverReportVO getTurnoverStatistics(LocalDate begin,LocalDate end) {
        //用于存放从begin，到end的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1); //日期计算
            dateList.add(begin);
        }
//        StringUtils.join(dateList,",");  //将集合变成字符串，并全部与逗号分隔
        List<Double> turnoverList=new ArrayList<>();
        for (LocalDate date : dateList) {
            //因为在数据库表操作中，查询的时间要大于某一个值，查询的字段数据要求年月日时分秒，所以这里将Date转为年月日时分秒，第一个是获得00：00，第二个是23.5999
            LocalDateTime DateTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //这里操作的是orders数据库表
            Map map =new HashMap<>();
            map.put("begin",DateTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover=orderMapper.sumByMap(map);
            turnover= turnover==null ? 0.0 :turnover;
            turnoverList.add(turnover);
        }


        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }


    /**
     * 用户统计
     * @param begin
     * @param end
     * @return
     */
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        //用于存放从begin，到end的日期
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1); //日期计算
            dateList.add(begin);
        }

        //存每天的新增用户数量
        List<Integer> newUserList=new ArrayList<>();
        //存每天的总用户数量
        List<Integer> allUserList=new ArrayList<>();

        for (LocalDate date : dateList) {
            LocalDateTime DateTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Map map =new HashMap<>();
            map.put("end",endTime);
            Integer allcount = userMapper.countByMap(map);
            allUserList.add(allcount);
            map.put("begin",DateTime);
            Integer newcount = userMapper.countByMap(map);
            newUserList.add(newcount);
        }

        return UserReportVO.builder()
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(allUserList,","))
                .dateList(StringUtils.join(dateList,","))
                .build();
    }


    /**
     * 订单统计
     * @param begin
     * @param end
     * @return
     */
    public OrderReportVO getordersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList=new ArrayList<>();
        dateList.add(begin);
        while (!begin.equals(end)){
            begin=begin.plusDays(1); //日期计算
            dateList.add(begin);
        }

        //订单数
        List<Integer> list1 =new ArrayList<>();
        //有效订单数
        List<Integer> list2 =new ArrayList<>();
        for (LocalDate date : dateList) {
            //每天订单数
            LocalDateTime DateTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount1 = getOrderCount(DateTime, endTime, null);
            list1.add(orderCount1);
            //每天有效订单数
            Integer orderCount2 = getOrderCount(DateTime, endTime, Orders.COMPLETED);
            list2.add(orderCount2);
        }
        //订单总数量
        Integer totalOrder = list1.stream().reduce(Integer::sum).get();
        //有效订单数
        Integer validOrderCount = list2.stream().reduce(Integer::sum).get();
        //订单完成率
        double v=0.0;
        if(totalOrder !=0) {
            v = validOrderCount.doubleValue() / totalOrder;
        }
         return  OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCountList(StringUtils.join(list1,","))
                .validOrderCountList(StringUtils.join(list2,","))
                .totalOrderCount(totalOrder)
                .validOrderCount(validOrderCount)
                 .orderCompletionRate(v)
                 .build();
    }

    //方法111
    private Integer getOrderCount(LocalDateTime begin,LocalDateTime end,Integer status){
        Map map =new HashMap<>();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status", status);

        return orderMapper.countByMap(map);
    }



    /**
     * 商品top10
     * @return
     */
    public SalesTop10ReportVO getsalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);
        List<GoodsSalesDTO> salesTop = orderMapper.getSalesTop(beginTime, endTime);
        //stream流从salesTop中获取name并将其全部封装进一个集合
        List<String> names = salesTop.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        //同理number
        List<Integer> Numbers = salesTop.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");
        String NumberList = StringUtils.join(Numbers, ",");


        return SalesTop10ReportVO.builder()
                .nameList(nameList)
                .numberList(NumberList)
                .build();
    }

    /**
     * 导出数据报表
     * @param response
     */
    public void exportBusinessData(HttpServletResponse response) {
        //1. 查询数据库，获取营业数据---查询最近30天的运营数据
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        //查询概览数据
        BusinessDataVO businessDataVO = workspaceService.getBusinessData(LocalDateTime.of(dateBegin, LocalTime.MIN), LocalDateTime.of(dateEnd, LocalTime.MAX));

        //2. 通过POI将数据写入到Excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("tem/运营数据报表模板.xlsx");

        try {
            //基于模板文件创建一个新的Excel文件
            XSSFWorkbook excel = new XSSFWorkbook(in);

            //获取表格文件的Sheet页
            XSSFSheet sheet = excel.getSheet("Sheet1");

            //填充数据--时间
            sheet.getRow(1).getCell(1).setCellValue("时间：" + dateBegin + "至" + dateEnd);

            //获得第4行
            XSSFRow row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第5行
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            //填充明细数据
            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                //查询某一天的营业数据
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }

            //3. 通过输出流将Excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            //关闭资源
            out.close();
            excel.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}
